Fan motor

ABSTRACT

The present invention provides a fan motor which includes a housing, a stator disposed inside the housing, a rotor disposed inside the stator, a blade coupled to the rotor and a printed circuit board disposed under the blade, wherein the housing includes an upper housing and a lower housing, wherein a board coupling portion to which the printed circuit board is coupled is disposed concavely formed at a lower outer surface of the lower housing, and the first mounting portion of the printed circuit board is coupled to the board coupling portion, wherein the board coupling portion includes a component hole and the component hole is disposed between an outer circumferential surface of the blade and an inner circumferential surface thereof. Therefore, an advantageous effect that a component having a large height may be mounted within a limited design height.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a Continuation Application of prior U.S. patentapplication Ser. No. 16/070,229 filed Jul. 13, 2018, which is a U.S.National Stage Application under 35 U.S.C. § 371 of PCT Application No.PCT/KR2017/000513, filed Jan. 16, 2017, which claims priority to KoreanPatent Application No. 10-2016-0004767, filed Jan. 14, 2016, and KoreanPatent Application No. 10-2016-0005243, filed Jan. 15, 2016, whoseentire disclosures are hereby incorporated by reference.

BACKGROUND 1. Field

The present invention relates to a fan motor.

2. Background

A fan motor is a blowing apparatus in which a rotor and a blade arecoupled to supply or discharge air. The fan motor includes the rotor, astator, and the blade, and the stator is installed to be spaced apartfrom the rotor along a circumference of the rotor. In addition, coilsfor generating a rotating magnetic field may be wound around the stator,the stator and the rotor may induce an electromagnetic interaction toinduce rotation of the rotor. When the rotor rotates, the blade coupledto the rotor rotates.

A printed circuit board is disposed under the blade. Specifically, theprinted circuit board may be disposed to be positioned in a bladeradius. However, in a case in which components having large heights aremounted on the printed circuit board, there is a problem in that thecomponents may not be mounted because of a structure in which theprinted circuit board is positioned under the blade. The reason is thatthere is a limitation in design height of the fan motor according to aproduct to which the fan motor is applied.

Meanwhile, a hole, through which a shaft of the rotor and a couplingmodule of a housing pass, may be formed in the printed circuit board. Ina case in which the hole is formed in the printed circuit board, a totalarea of the printed circuit board decreases. When the area of theprinted circuit board decreases, heating efficiency reduces. Therefore,there is a problem in that performance of components mounted on theprinted circuit board degrades.

BRIEF DESCRIPTION OF THE DRAWINGS

The embodiments will be described in detail with reference to thefollowing drawings in which like reference numerals refer to likeelements wherein:

FIG. 1 is a view illustrating a fan motor according to a embodiment.

FIG. 2 is a cross-sectional view illustrating the fan motor illustratedin FIG.

FIG. 3 is a view illustrating a printed circuit board of the fan motorillustrated in FIG. 1.

FIG. 4 is a view illustrating a first mounting portion and a secondmounting portion of the printed circuit board.

FIG. 5 is a view illustrating a first space portion and a second spaceportion of a housing of the fan motor illustrated in FIG. 1.

FIG. 6 is an exploded view illustrating the fan motor illustrated inFIG. 1.

FIG. 7 is a view illustrating a board coupling portion of the housing.

FIG. 8 is a view illustrating a position of component holes of the boardcoupling portion.

FIG. 9 is a view illustrating the fan motor in a state in which an upperhousing is opened.

FIG. 10 is a view illustrating a board cover of the housing.

FIG. 11 is a view illustrating an air circulation hole and a cable-inhole of the board cover.

FIG. 11 is a view illustrating an air circulation hole and a cable-inhole of the board cover.

FIG. 12 is a view illustrating a fan motor according to a secondembodiment.

FIG. 13 is a cross-sectional view illustrating the fan motor illustratedin FIG. 12.

FIG. 14 is a view illustrating a printed circuit board of the fan motorillustrated in FIG. 12.

FIG. 15 is a view illustrating the printed circuit board coupled to ahousing.

FIG. 16 is a view illustrating a position of electrical components.

FIG. 17 is a view illustrating the electrical components cooled byblowing.

FIG. 18 is a view illustrating the position of the electrical componentscorresponding to a position of a blade and a position of a blowing port.

FIG. 19 is a view illustrating the position of the electrical componentscorresponding to air stream velocity due to the blade.

DETAILED DESCRIPTION

Hereinafter, exemplary embodiments of the present invention will bedescribed with reference to the accompanying drawings in detail.Purposes, specific advantages, and novel features of the invention willbe made clear from the exemplary embodiments and the following detaileddescription in connection with the accompanying drawings. Terms andwords used in this specification and claims are not to be interpreted aslimited to commonly used meanings or meanings in dictionaries and shouldbe interpreted as having meanings and concepts which are consistent withthe technological scope of the invention based on the principle that theinventors have appropriately defined concepts of terms in order todescribe the invention in the best way. In the description of theinvention, when it is determined that detailed descriptions of relatedwell-known functions unnecessarily obscure the gist of the invention,the detailed descriptions thereof will be omitted.

It will be understood that, although the terms “first,” “second,” etc.may be used herein to describe various elements, these elements shouldnot be limited by these terms. These terms are only used to distinguishone element from another. For example, a first element could be termed asecond element, and a second element could similarly be termed a firstelement without departing from the scope of the present invention. Asused herein, the term “and/or” includes any and all combinations of oneor more of the associated listed items.

FIG. 1 is a view illustrating a fan motor according to a embodiment, andFIG. 2 is a cross-sectional view illustrating the fan motor illustratedin FIG. 1.

Referring to FIGS. 1 and 2, a fan motor 10 according to the embodimentmay include a housing 100, a stator 200, a rotor 300, a blade 400, and aprinted circuit board 500.

The stator 200, the rotor 300, and the blade 400 may be disposed insidethe housing 100. The housing 100 may include an intake 110 for drawingin air and a blowing port 120 for discharging the drawn in inhaled air.In addition, the housing 100 may include a blowing path 130 connected tothe blowing port 120.

The stator 200 may be disposed inside an inner cover 600. The stator 200may be formed by stacking a plurality of steel plates includingring-shaped yoke portions and tooth portions disposed in acircumferential direction, protruding outward from the yoke portions ina diameter direction, and spaced an equiangular interval from eachother. Coils for generating a rotating electromagnetic field may bewound around the tooth portions.

The rotor 300 is disposed outside the stator 200. A shaft 310 may becoupled to a center of the rotor 300. In addition, the shaft 310 iscoupled to the blade 400.

When a current is supplied to the coils wound around the stator 200, amutual interaction is induced between the stator 200 and the rotor 300,and the rotor 300 is rotated. When the rotor 300 rotates, the shaft 310rotates to provide power to the blade 400.

FIG. 3 is a view illustrating a printed circuit board of the fan motorillustrated in FIG. 1, and FIG. 4 is a view illustrating a firstmounting portion and a second mounting portion of the printed circuitboard.

Referring to FIGS. 3 and 4, the printed circuit board 500 may include afirst mounting portion 510 and a second mounting portion 520. The firstmounting portion 510 is a portion positioned within a radius R of theblade 400 in a radial direction in the printed circuit board 500. Thesecond mounting portion 520 is a portion disposed outside the radius Rof the blade 400 in the radial direction in the printed circuit board500.

The printed circuit board 500 may be divided into the first mountingportion 510 and the second mounting portion 520 with respect to avirtual circle B defined along an outer circumferential surface of theblade 400.

First components 530 such as a field effect transistor (FET) having arelatively low height may be mounted on the first mounting portion 510.A second component 540 such as an electrolysis capacitor havingrelatively large heights (for example, 35 mm) may be mounted on thesecond mounting portion 520. The reason is that there are no limitationsin height of the blade 400 when the components are mounted because thesecond mounting portion 520 is disposed outside the radius R of theblade 400.

FIG. 5 is a view illustrating a first space portion and a second spaceportion of a housing of the fan motor illustrated in FIG. 1, and FIG. 6is an exploded view illustrating the fan motor illustrated in FIG. 1.

Referring to FIG. 5, the housing 100 may be divided into a first spaceportion S1 and a second space portion S2. The blade 400, the stator 200,and the rotor 300 may be disposed in the first space portion S1. Inaddition, the printed circuit board 500 may be disposed in the secondspace portion S2.

For example, referring to FIG. 6, the housing 100 may include an upperhousing 100A and a lower housing 100B which are coupled. A board cover150 may be provided on the upper housing 100A. In addition, the lowerhousing 100B may include a board coupling portion 140. The board cover150 and the board coupling portion 140 may form the second space portionS2 for accommodating the printed circuit board 500.

FIG. 7 is a view illustrating a board coupling portion of the housing.

Referring to FIG. 7, the board coupling portion 140 may be concavelyformed in a lower surface of the lower housing 1008. The board couplingportion 140 and the first mounting portion 510 (see FIG. 4) of theprinted circuit board 500 may be coupled. Meanwhile, component holes 141may be formed in the board coupling portions 140. The first components530 such as an FET mounted on the first mounting portion 510 may beinserted into the component holes 141. The component holes 141 may beprovided at a position, which corresponds to a position of the firstcomponents 530, in the board coupling portion 140

The first components 530 inserted into the component holes 141 areexposed to the first space portion S1 of the housing 100. Here, thefirst components 530 are disposed just under the blade 400. Accordingly,cooling efficiency of the first components 530 may increase due to airblown by the blade 400. In a case in which the first component 530 is anFET, heat radiation may be high. In this case, a structure in which theboard coupling portion 140 includes the component holes 141 mayadditionally cool the FET to increase total cooling efficiency of thefan motor.

Meanwhile, connecters of U-, V-, and W-phases connected to the coils ofthe stator 200 and connecting holes 142 for connecting the connector andthe printed circuit board 500 may be formed in the board couplingportion 140.

FIG. 8 is a view illustrating a position of component holes of the boardcoupling portion.

When the board coupling portion 140 and the first mounting portion 510(see FIG. 3) are coupled, the component holes 141 may be disposedbetween the outer circumferential surface and an inner circumferentialsurface of the blade 400, That is, as illustrated in FIG. 8, thecomponent holes 141 may be disposed between the virtual circle B definedalong the outer circumferential surface of the blade 400 and a virtualcircle C defined along the inner circumferential surface of the blade400.

Specifically, the component holes 141 may be disposed along a referenceline D passing through a center between the outer circumferentialsurface and the inner circumferential surface of the blade 400.

FIG. 9 is a view illustrating the fan motor in a state in which an upperhousing is opened.

Referring to FIG. 9, when the board coupling portion 140 (see FIG. 7)and the printed circuit board 500 are coupled, the second mountingportion 520 of the printed circuit board 500 is exposed to an outside ofthe lower housing 1008. Accordingly, the second component 540 having arelatively large height may be mounted on the printed circuit board 500.In addition, due to the second mounting portion 520 extending outwardfrom the lower housing 1008, there is also an advantage in designing inconsideration of heating and electromagnetic compatibility(EMC)/electromagnetic interference (EMI).

Meanwhile, in the state in which the board coupling portion 140 and theprinted circuit board 500 are coupled, a cover for covering the boardcoupling portion 140 may be coupled to the lower surface of the lowerhousing 1008 (see FIG. 6).

FIG. 10 is a view illustrating a board cover of the housing.

Referring to FIG. 10, the board cover 150 is formed to extend from theupper housing 100A, and serves to cover the second mounting portion 520(see FIG. 9) of the printed circuit board 500 coupled to the boardcoupling portion 140 (see FIG. 7). The board cover 150 may be formed toextend downward to have a suitable height so as to cover the secondmounting portion 520 (see FIG. 9) disposed near the lower surface of thelower housing 1008, and so as to be coupled to the printed circuit board500. For example, a height H1 of the board cover 150 may be greater thana height H2 of the upper housing 100A.

Meanwhile, a first coupling portion 151 for physically being coupled tothe printed circuit board 500 may also be provided in the board cover150. The first coupling portion 151 may be coupled to a second couplingportion 550 (see FIG. 3) formed in the printed circuit board 500.

FIG. 11 is a view illustrating an air circulation hole and a cable-inhole of the board cover.

Referring to FIG. 11, the board cover 150 may include air circulationholes 152 and a cable-in hole 153. The air circulation holes 152 serveto allow an inside of the board cover 150 to communicate with an outsidethereof and circulate internal air having a temperature increased due toheating of the printed circuit board 500 to the outside. Slots having along hole shape may be formed as the air circulation holes 152 at upperand side surfaces of the board cover 150. Since the cable-in hole 153 isformed by cutting a part of the side surface of the board cover 150, acable connected to the printed circuit board 500 may enter through theboard cover 150. The cable-in hole 143 may allow the cable to beconnected to the printed circuit board 500 inside the board cover 150from the outside after the printed circuit board 500 (see FIG. 6) isaccommodated in the board cover 150.

Accordingly, there is an advantage in that an operation, in which thecable is easily connected to the printed circuit board 500 even afterthe printed circuit board 500 is assembled at the board coupling portion140, is easily performed.

FIG. 12 is a view illustrating a fan motor according to a secondembodiment, and FIG. 13 is a cross-sectional view illustrating the fanmotor illustrated in FIG. 12.

Referring to FIGS. 12 and 13, a fan motor 20 according to the embodimentmay include a housing 1000, a stator 2000, a rotor 3000, a blade 4000,and a printed circuit board 5000.

The stator 2000, the rotor 3000, and the blade 4000 may be disposedinside the housing 1000. The housing 1000 may include an intake 1100 fordrawing in air and a blowing port 1200 for discharging the drawn in air.In addition, the housing 1000 may include a blowing path 1300 connectedto the blowing port 1200. Meanwhile, the housing 1000 may include anupper housing 1000A and a lower housing 1000B which are coupled.

The stator 2000 may be disposed inside an inner cover 6000. The stator2000 may be formed by stacking a plurality of steel plates includingring-shaped yoke portions and tooth portions disposed in acircumferential direction, protruding outward from the yoke portions ina diameter direction, and spaced an equiangular interval from eachother. Coils for generating a rotating electromagnetic field may bewound around the tooth portions.

The rotor 3000 is disposed outside the stator 2000. A shaft 3100 may becoupled to a center of the rotor 3000. In addition, the shaft 3100 iscoupled to the blade 4000.

When a current is supplied to the coils wound around the stator 2000, amutual interaction is induced between the stator 2000 and the rotor3000, and the rotor 3000 is rotated. When the rotor 3000 rotates, theshaft 3100 rotates to provide power to the blade 4000.

FIG. 14 is a view illustrating a printed circuit board of the fan motorillustrated in FIG. 12, and FIG. 15 is a view illustrating the printedcircuit board coupled to a housing.

Referring to FIGS. 14 and 15, the printed circuit board 5000 may bedivided into a first region 5100 and a second region 5200.

When the printed circuit board 5000 is disposed under the blade 4000,the first region 5100 is a portion positioned within a radius R of theblade 4000, and the second region 5200 is a portion disposed outside theradius R of the blade 4000.

A hole 5300 may be formed at a center of the first region 5100. The hole5300 is a portion through which a bearing assembly 7000 for rotatablysupporting the shaft 3100 passes. Due to the hole 5300, a total area ofthe printed circuit board 5000 decreases. The embodiment provides asecond region 5200 to compensate for the decreased area. In addition,electrical components 5400 such as an FET which is highly heated may bemounted on the second region 5200.

As illustrated in FIG. 15, in a case in which the printed circuit board5000 and the lower housing 1000B are coupled, the second region 5200 isdisposed outside the blade 4000.

FIG. 16 is a view illustrating a position of electrical components.

Referring to FIG. 16, the electrical components 5400 may be disposedoutside a virtual circle B defined along an outer circumferentialsurface of the blade 4000. Specifically, the electrical components 5400may be arranged on a track O having a radius R2 which is greater than anouter diameter R1 of the blade among tracks about a rotating shaft CL ofthe blade 4000. In addition, the electrical components 5400 may bedisposed along at least any one track O. In addition, the electricalcomponents 5400 may be disposed along a track closest to the blade 4000within a range in which the electrical components 5400 are disposedoutside the blade 4000. This is to minimize noise generated due tofriction between air passing through the blowing path 1300 and theelectrical components 5400.

FIG. 17 is a view illustrating the electrical components cooled byblowing.

Referring to FIG. 17, when air W blown by the blade 4000 flows towardthe blowing port 1200, the air W passes by the electrical components5400 disposed on the blowing path 1300. The blown air W cools theelectrical components 5400 while passing by the electrical components5400. In addition, the blown air W cools the second region 5200 of theprinted circuit board 5000 by absorbing heat generated by the secondregion 5200.

FIG. 18 is a view illustrating the position of the electrical componentscorresponding to a position of a blade and a position of a blowing port.

Referring to FIG. 18, a position A of the electrical components 5400 inconsideration of the blade 4000 and the blowing port 1200 may bedisposed at an upper right portion of the blade 4000.

Specifically, in a case in which the blowing port 1200 is disposed atone side of a first reference line L1, the position A of the electricalcomponents 5400 may be provided at the other side of the first referenceline L1. Here, the blowing port 1200 and the position A of theelectrical components 5400 may be provided at one side of the secondreference line L2.

Here, the first reference line L1 refers to a virtual reference linewhich passes through a center CL of the blade 4000 and is formed inparallel to a blowing surface 1210 of the blowing port 1200 of thehousing 1000, and the second reference line L2 refers to a virtualreference line which passes through the center CL of the blade 4000 andis formed to be perpendicular to the blowing surface 1210 of the blowingport 1200 of the housing 1000.

FIG. 19 is a view illustrating the position of the electrical componentscorresponding to air stream velocity due to the blade.

Referring to FIG. 19, the position A of the electrical components 5400corresponding to an air stream velocity due to the blade will bedescribed below. Since an upper right portion of the blade 4000corresponds to a region in which a stream velocity is low, and theposition A of the electrical components 5400 is provided at the region,cooling performance of the electrical components 5400 may be securedwhile wind-tunnel noise is minimized.

As described above, the fan motor according to one exemplary embodimentof the present invention has been specifically described with referenceto the accompanying drawings.

The above description is only an example describing a technologicalscope of the present invention. Various changes, modifications, andreplacements may be made without departing from the spirit and scope ofthe present invention by those skilled in the art. Therefore, theembodiments disclosed above and in the accompanying drawings should beconsidered in a descriptive sense only and not for limiting thetechnological scope. The technological scope of the present invention isnot limited by these embodiments and the accompanying drawings. Thespirit and scope of the present invention should be interpreted by theappended claims and encompass all equivalents falling within the scopeof the appended claims.

The present invention is directed to providing a fan motor in whichcomponents having large heights may be mounted within a limited designheight.

The present invention is also directed to providing a fan motor capableof effectively cooling components mounted on a printed circuit boardeven when an area of the printed circuit board is small, and a vehicleincluding the same.

Objectives to be achieved by embodiments of the present invention arenot limited to the above-described objectives, and other objectives,which are not described above, may be clearly understood by thoseskilled in the art through the following specification.

One aspect of the present invention provides a fan motor including ahousing, a stator disposed inside the housing, a rotor disposed insidethe stator, a blade coupled to the rotor and a printed circuit boarddisposed under the blade, wherein the housing includes an upper housingand a lower housing, wherein a board coupling portion to which theprinted circuit board is coupled is disposed concavely formed at a lowerouter surface of the lower housing, and the first mounting portion ofthe printed circuit board is coupled to the board coupling portion,wherein the board coupling portion includes a component hole and thecomponent hole is disposed between an outer circumferential surface ofthe blade and an inner circumferential surface thereof.

The printed circuit board may include a first mounting portionpositioned inside a radius of the blade and a second mounting portionpositioned outside the radius of the blade, wherein a component mountedon the first mounting portion is inserted into the component hole.

The upper housing may include a board cover covering the part to coverthe second mounting portion of the exposed area of the printed circuitboard, wherein the printed circuit board includes a bottom surface thatis exposed to outside of the fan motor.

The component hole may communicate with an inner space between the upperhousing and the lower housing.

The component hole may be disposed along a reference line passingthrough a center between the outer circumferential surface of the bladeand the inner circumferential surface thereof.

The board cover may include an air circulation hole.

The board cover may include a cable-in hole.

The board cover may include a first coupling portion and the printedcircuit board includes a second coupling portion coupled to the firstcoupling portion.

Another aspect of the present invention provides a vehicle including afan motor which has a housing, a stator disposed inside the housing, arotor disposed inside the stator, a blade coupled to the rotor, and aprinted circuit board disposed under the blade, wherein the printedcircuit board includes a first mounting portion positioned inside aradius of the blade and a second mounting portion positioned outside theradius of the blade.

Still another aspect of the present invention provides a fan motorincluding a housing, a stator disposed inside the housing, a rotordisposed inside the stator, a blade coupled to the rotor, and a printedcircuit board disposed under the blade, wherein the housing includes afirst space portion having the blade and a second space portion dividedfrom the first space portion and including the printed circuit board.

The printed circuit board may include a first mounting portionpositioned inside a radius of the blade and a second mounting portionpositioned outside the radius of the blade.

The housing may include an upper housing and a lower housing which arecoupled to form the first space portion and the second space portion.

The lower housing may include a board coupling portion coupled to thefirst mounting portion.

The board coupling portion may include a component hole whichcommunicates with the first space portion and into which a componentmounted on the first mounting portion is inserted.

The component hole may be disposed between an outer circumferentialsurface of the blade and an inner circumferential surface thereof.

The component hole may be disposed along a reference line passingthrough a center between the outer circumferential surface of the bladeand the inner circumferential surface thereof.

The upper housing may include a board cover configured to cover thesecond mounting portion.

The board cover may include an air circulation hole.

The board cover may include a cable-in hole.

The board cover may include a first coupling portion, and the printedcircuit board may include a second coupling portion coupled to the firstcoupling portion.

Yet another aspect of the present invention provides a vehicle includinga fan motor which has a housing, a stator disposed inside the housing, arotor disposed inside the stator, a blade coupled to the rotor, and aprinted circuit board disposed under the blade, wherein the housingincludes a first space portion having the blade and a second spaceportion divided from the first space portion and including the printedcircuit board.

Yet another aspect of the present invention provides a fan motorincluding a housing, a stator disposed inside the housing, a rotordisposed inside the stator, a blade coupled to the rotor, and a printedcircuit board disposed under the stator, wherein the printed circuitboard includes an electrical component arranged on a track having aradius which is greater than an outer diameter of the blade among tracksabout a rotating shaft of the blade.

A plurality of electrical components may be arranged on one track.

A blowing port may be disposed at one side of a first reference linewhich passes through a center of the blade and is formed in parallel toa blowing surface of the blowing port of the housing, and the electricalcomponent may be disposed at the other side of the first reference line.

The electrical component may be disposed at any one side, at which theblowing port is disposed, of a second reference line which passesthrough the center of the blade and is formed to be perpendicular to theblowing surface of the blowing port of the housing.

The housing may include a first coupling portion, and the printedcircuit board may include a second coupling portion coupled to the firstcoupling portion.

The housing may include a lower housing and an upper housing which arecoupled, and the lower housing may include the first coupling portion.

The fan motor may further include a bearing assembly having a bearingconfigured to rotatably support a rotating shaft of the rotor, and abearing housing having the bearing and coupled to the lower housing.

A hole through which the bearing housing passes may be provided in theprinted circuit board.

Yet another aspect of the present invention provides a vehicle includinga fan motor which has a housing, a stator disposed inside the housing, arotor disposed inside the stator, a blade coupled to the rotor, and aprinted circuit board disposed under the stator, wherein the printedcircuit board includes an electrical component arranged on a trackhaving a radius which is greater than an outer diameter of the bladeamong tracks about a rotating shaft of the blade.

According to one embodiment of the present invention, since a printedcircuit board includes a first mounting portion positioned inside aradius of a blade and a second mounting portion positioned outside theradius of the blade, and components having large heights are disposed inthe second mounting portion, there is an advantageous effect that thecomponents having large heights can be mounted within a limited designheight.

According to one embodiment of the present invention, since the printedcircuit board is formed such that the components are disposed on ablowing path, there is an advantageous effect in that the components,which are mounted on the printed circuit board in a state in which anarea of the printed circuit board decreases, can be effectively cooled.

According to one embodiment of the present invention, since the printedcircuit board is formed such that the components are disposed on a trackdisposed outside a blade on the blowing path, there is an advantageouseffect in that the components, which are mounted on the printed circuitboard in the state in which the area of the printed circuit boarddecreases, can be more effectively cooled.

Any reference in this specification to “one embodiment,” “anembodiment,” “example embodiment,” etc., means that a particularfeature, structure, or characteristic described in connection with theembodiment is included in at least one embodiment of the invention. Theappearances of such phrases in various places in the specification arenot necessarily all referring to the same embodiment. Further, when aparticular feature, structure, or characteristic is described inconnection with any embodiment, it is submitted that it is within thepurview of one skilled in the art to effect such feature, structure, orcharacteristic in connection with other ones of the embodiments.

Although embodiments have been described with reference to a number ofillustrative embodiments thereof, it should be understood that numerousother modifications and embodiments can be devised by those skilled inthe art that will fall within the spirit and scope of the principles ofthis disclosure. More particularly, various variations and modificationsare possible in the component parts and/or arrangements of the subjectcombination arrangement within the scope of the disclosure, the drawingsand the appended claims. In addition to variations and modifications inthe component parts and/or arrangements, alternative uses will also beapparent to those skilled in the art.

What is claimed is:
 1. A fan motor comprising: a housing; a statordisposed inside the housing; a rotor disposed inside the stator; a bladecoupled to the rotor; and a printed circuit board disposed under theblade, wherein the housing includes an upper housing and a lowerhousing, wherein a board coupling portion to which the printed circuitboard is coupled is disposed concavely formed at a lower outer surfaceof the lower housing, and the first mounting portion of the printedcircuit board is coupled to the board coupling portion, wherein theboard coupling portion includes a component hole and the component holeis disposed between an outer circumferential surface of the blade and aninner circumferential surface thereof.
 2. The fan motor of claim 1,wherein the printed circuit board includes: a first mounting portionpositioned inside a radius of the blade; and a second mounting portionpositioned outside the radius of the blade, wherein a component mountedon the first mounting portion is inserted into the component hole. 3.The fan motor of claim 2, wherein the upper housing including a boardcover covering the part to cover the second mounting portion of theexposed area of the printed circuit board, wherein the printed circuitboard includes a bottom surface that is exposed to outside of the fanmotor.
 4. The fan motor of claim 2, wherein the component holecommunicates with an inner space between the upper housing and the lowerhousing.
 5. The fan motor of claim 4, wherein the component hole isdisposed along a reference line passing through a center between theouter circumferential surface of the blade and the inner circumferentialsurface thereof.
 6. The fan motor of claim 3, wherein the board coverincludes an air circulation hole.
 7. The fan motor of claim 3, whereinthe board cover includes a cable-in hole.
 8. The fan motor of claim 3,wherein: the board cover includes a first coupling portion; and theprinted circuit board includes a second coupling portion coupled to thefirst coupling portion.